A5068166422- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Botany, Ecology, and Taxonomy Studies
- Botanical Research and Applications
- Photosynthetic Processes and Mechanisms
- Genomics and Phylogenetic Studies
- Plant Water Relations and Carbon Dynamics
Brown University
2012-2016
C(4) photosynthesis is a series of anatomical and biochemical modifications to the typical C(3) pathway that increases productivity plants in warm, sunny, dry conditions. Despite its complexity, it evolved more than 62 times independently flowering plants. However, origins are absent from most plant lineages clustered others, suggesting some characteristics increase evolvability certain phylogenetic groups. The trait has 22-24 grasses, all occurred within PACMAD clade, whereas similarly...
This project sampled throughout Phacelia using the internal transcribed spacer region (ITS-1, ITS-2, and 5.8S gene) of nuclear ribosomal DNA (nrITS) chloroplast gene (ndhF) to infer phylogenies for plastid partitions. Nuclear partitions were incongruent in our analyses. Phylogenetic analyses (maximum parsimony, maximum likelihood, Bayesian inference) recovered tree topologies similar previous molecular studies. We corroborate incongruence between placement some problematic groups (e.g.,...
Three taxa are recognized at the rank of species based on molecular phylogenetic studies in Phacelia sect. Glandulosae (Hydrophyllaceae, Boraginales). Results those did not support a monophyletic crenulata Torr. ex S. Watson, because 3 varieties that were supported as distinct lineages (nuclear and chloroplast) morphological characters. Typification status is clarified for P. corrugata A. Nelson orbicularis Rydb. A new nomenclatural combination var. angustifolia N.D. Atwood established to...
Phacelia cicutaria Greene var. hubbyi (J. F. Macbr.) J. T. Howell warrants elevation from varietal to species status based on morphological evidence. It is distinguished morphologically P. and hispida (A. Gray) by its more robust habit, densely congested inflorescences, lack of mottled markings the corolla, longer stamens style, thick shaggy hairs stems leaves, calyx lobes that closely invest fruit.